Comparing hashrates of different PoWs is quite meaningless...
It is very meaningful, it is comparing the number of hashes that are being computed every second in algorithms that sometimes are roughly the same too (SHA256 vs SHA3-256 vs scrypt) that in turn shows number of miners hence the total power consumption.
If you want to compare mining efforts, use something more meaningful like daily dollar issuance;
see the column labeled "PoW Produced (24h)" in
https://www.f2pool.com/coinsJust because it has the word "PoW" in it doesn't mean it is related to power consumption or hashrate!
They are taking the total new coins produced that day and multiplying it by the price.
BTC: 6.25 * 144 * $41,000 = ~$36.89 mil
ETH: 2.00 * 6500 * $ 2,700 = ~$31.81 mil
LTC: 12.50 * 550 * $ 109 = ~$ 0.75 mil